package cn.iocoder.yudao.module.digital.dal.mysql.handler;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedJdbcTypes;
import org.apache.ibatis.type.MappedTypes;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

@MappedJdbcTypes(JdbcType.VARCHAR)
@MappedTypes(List.class)
public class ListStringTypeHandler extends BaseTypeHandler<List<String>> {
    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, List<String> parameter, JdbcType jdbcType) throws SQLException {
        try {
            ps.setString(i, OBJECT_MAPPER.writeValueAsString(parameter));
        } catch (Exception e) {
            throw new SQLException("Error converting List<String> to JSON string", e);
        }
    }

    @Override
    public List<String> getNullableResult(ResultSet rs, String columnName) throws SQLException {
        return convertToList(rs.getString(columnName));
    }

    @Override
    public List<String> getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return convertToList(rs.getString(columnIndex));
    }

    @Override
    public List<String> getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return convertToList(cs.getString(columnIndex));
    }

    private List<String> convertToList(String value) throws SQLException {
        if (value == null) {
            return null;
        }
        try {
            return OBJECT_MAPPER.readValue(value, new TypeReference<List<String>>() {});
        } catch (Exception e) {
            throw new SQLException("Error converting JSON string to List<String>", e);
        }
    }
}
